FreeBSD up to 11.2/11.3/12.0 bhyve e1000 Device Emulation TCP Segment memory corruption
CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system. | Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack. | CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability. |
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7.1 | $0-$5k | 0.00 |
A vulnerability has been found in FreeBSD up to 11.2/11.3/12.0 (Operating System) and classified as critical. Affected by this vulnerability is some unknown functionality of the component bhyve e1000 Device Emulation. The manipulation as part of a TCP Segment leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
In FreeBSD 12.0-STABLE before r350619, 12.0-RELEASE before 12.0-RELEASE-p9, 11.3-STABLE before r350619, 11.3-RELEASE before 11.3-RELEASE-p2, and 11.2-RELEASE before 11.2-RELEASE-p13, the bhyve e1000 device emulation used a guest-provided value to determine the size of the on-stack buffer without validation when TCP segmentation offload is requested for a transmitted packet. A misbehaving bhyve guest could overwrite memory in the bhyve process on the host.
The weakness was published 08/30/2019 (Website). It is possible to read the advisory at security.FreeBSD.org. This vulnerability is known as CVE-2019-5609 since 01/07/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2020).
Applying a patch is able to eliminate this problem.
Similar entries are available at 141117, 141116 and 141114.
Product
Type
Name
CPE 2.3
CPE 2.2
CVSSv3
VulDB Meta Base Score: 7.4VulDB Meta Temp Score: 7.1
VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
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unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Threat: 🔍Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍
Countermeasures
Recommended: PatchStatus: 🔍
0-Day Time: 🔍
Timeline
01/07/2019 🔍08/30/2019 🔍
08/30/2019 🔍
08/10/2020 🔍
Sources
Product: https://www.freebsd.org/Advisory: security.FreeBSD.org
Status: Not defined
Confirmation: 🔍
CVE: CVE-2019-5609 (🔍)
See also: 🔍
Entry
Created: 08/30/2019 03:38 PMUpdated: 08/10/2020 10:31 AM
Changes: (1) advisory_confirm_url
Complete: 🔍
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